U2733B-C

Features:

Microprocessor-controlled via an I²C bus
Four addresses selectable
Four reference divide factors selectable: 1024, 1120, 1152, 1536 effectively
Programmable 15-bit counter 1:2048 to 1:32767 effectively
Tristate phase detector with programmable charge pump
Superior phase-noise performance
De-activation of tuning output programmable
Six switching outputs (open collector)
Reference frequency doubler (open collector output)
Lock-status indication (open collector)


Pinout




Specifications

Parameters	Symbol	Min.	Typ.	Max.	Unit
Supply voltage	VS	0.3		+5.5	V
Junction temperature	Tj			125	°C
Storage temperature	Tstg	40		+125	°C
RF input voltage (AC) Pins 18 and 17	RF, NRF			1	Vpp
Reference input voltage (AC) Pins 4 and 5	REF, NREF			1	Vpp
I2C-bus input / output voltage Pins 7 and 8	SCL, SDA	0.3		VS	V
SDA output current Pin 8	SDA			5	mA
Address select voltage Pin 6	ADR	0.3		VS	V
Switch output voltage open collector	SWa	0.3		5.5	V
Switch output current open collector	SWa	4			mA
PLCK output voltage open collector Pin 3	PLCK	0.3		5.5	V
PLCK output current open collector Pin 3	PLCK			0.5	mA
Frequency doubler output open collector Pins 9 and 10	FDO, NFDO	VS 1		5.5	V

Description

The U2733B-C is a monolithic integrated fractional-N frequency synthesizer circuit fabricated in TEMIC's advanced UHF5S technology. Designed for applications in DAB receivers, U2733B-C controls a VCO to synthesize frequencies in the range of 70 MHz to 500 MHz in a 16 kHz raster; four different reference divide factors can be selected. The lock status of the phase detector is indicated at a special output pin, six switching outputs can be addressed. An internal frequency doubler provides an output signal having twice the frequency of the reference oscillator. All functions of U2733B-C are controlled by I²C bus.

Electrostatic sensitive U2733B-C. Observe precautions for handling.